mirror of https://github.com/ZDoom/qzdoom.git
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
/*
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** LLVM if statement branching
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** Copyright (c) 2016 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#include "precomp.h"
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#include "ssa_if_block.h"
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#include "ssa_scope.h"
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SSAIfBlock::SSAIfBlock()
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: if_basic_block(0), else_basic_block(0), end_basic_block(0)
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{
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}
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void SSAIfBlock::if_block(SSABool true_condition)
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{
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if_basic_block = llvm::BasicBlock::Create(SSAScope::context(), "if", SSAScope::builder().GetInsertBlock()->getParent());
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else_basic_block = llvm::BasicBlock::Create(SSAScope::context(), "else", SSAScope::builder().GetInsertBlock()->getParent());
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end_basic_block = else_basic_block;
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SSAScope::builder().CreateCondBr(true_condition.v, if_basic_block, else_basic_block);
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SSAScope::builder().SetInsertPoint(if_basic_block);
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}
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void SSAIfBlock::else_block()
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{
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end_basic_block = llvm::BasicBlock::Create(SSAScope::context(), "end", SSAScope::builder().GetInsertBlock()->getParent());
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SSAScope::builder().CreateBr(end_basic_block);
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SSAScope::builder().SetInsertPoint(else_basic_block);
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}
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void SSAIfBlock::end_block()
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{
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SSAScope::builder().CreateBr(end_basic_block);
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SSAScope::builder().SetInsertPoint(end_basic_block);
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}
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void SSAIfBlock::end_retvoid()
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{
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SSAScope::builder().CreateRetVoid();
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SSAScope::builder().SetInsertPoint(end_basic_block);
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}
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